WO2013052201A1 - Barrière contre l'humidité/la vapeur et son procédé de réalisation et d'utilisation - Google Patents

Barrière contre l'humidité/la vapeur et son procédé de réalisation et d'utilisation Download PDF

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Publication number
WO2013052201A1
WO2013052201A1 PCT/US2012/050270 US2012050270W WO2013052201A1 WO 2013052201 A1 WO2013052201 A1 WO 2013052201A1 US 2012050270 W US2012050270 W US 2012050270W WO 2013052201 A1 WO2013052201 A1 WO 2013052201A1
Authority
WO
WIPO (PCT)
Prior art keywords
water vapor
vapor impermeable
sheet
substrate
adhesive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2012/050270
Other languages
English (en)
Inventor
Leslie Jay TAYLOR
Robert E. ROBERTSON
Joseph A. TUTTOLOMONDO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Textile Rubber and Chemical Co Inc
Original Assignee
Textile Rubber and Chemical Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Textile Rubber and Chemical Co Inc filed Critical Textile Rubber and Chemical Co Inc
Publication of WO2013052201A1 publication Critical patent/WO2013052201A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2405/00—Adhesive articles, e.g. adhesive tapes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2471/00—Floor coverings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F15/00—Flooring
    • E04F15/18—Separately-laid insulating layers; Other additional insulating measures; Floating floors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/14—Layer or component removable to expose adhesive
    • Y10T428/1476—Release layer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24752—Laterally noncoextensive components
    • Y10T428/2476—Fabric, cloth or textile component

Definitions

  • the present invention generally relates to a moisture/vapor barrier. More particularly, this invention relates to a moisture/vapor barrier used as an underlayment for a floor covering material. The present invention also relates to a method of making the moisture/vapor barrier. The present invention also relates to a system for installing the moisture/vapor barrier on porous flooring, such as concrete. The present invention also relates to a system for seaming the moisture/vapor barrier.
  • Floor covering is a broad term used to describe any decorative material applied over a floor to provide a finished surface for walking upon.
  • Floor coverings include, but are not limited to, carpet; carpet tile; area rugs; resilient flooring, such as linoleum or vinyl tile or sheeting; hardwood flooring; engineered wood flooring; ceramic tile; stone; terrazzo and the like.
  • a floor covering is applied over a porous subflooring, such as concrete, moisture or water vapor may migrate up through the concrete by capillary action and collected between the surface of the concrete and the floor covering. This moisture or water vapor has deleterious effects on adhesives used for holding the floor covering material to the concrete potentially causing debonding, deterioration of the floor covering material and microbial growth.
  • the present invention satisfies the foregoing needs by providing an improved water vapor barrier.
  • the present invention is relatively easier to manufacture and install than prior art water vapor barriers. And, the present invention provides improved water vapor barrier performance.
  • the present invention comprises a water vapor barrier.
  • the water vapor barrier comprises a water vapor impermeable substrate, the substrate comprises a sheet of polymeric material and the substrate has a width.
  • the water vapor barrier also comprises a first fabric on one side of the substrate, the first fabric having a width less than the width of the substrate such that a portion of the substrate is exposed on both sides of the first fabric.
  • the water vapor barrier also comprises a first water vapor impermeable tape comprising a first water vapor impermeable backing, an adhesive disposed on one surface of the first backing, a first release sheet covering and releasably attached to one portion of the adhesive on the first backing and the other portion of the adhesive on the first backing attached to an exposed portion of the substrate adjacent the first fabric.
  • the water vapor barrier also comprises a second fabric on the side of the substrate opposite the first fabric, the second fabric having a width less than the width of the substrate such that a portion of the substrate is exposed on both sides of the second fabric.
  • the present invention comprises a method.
  • the method comprises applying to a floor a first elongate sheet of a water vapor impermeable membrane comprising a first water vapor impermeable substrate, the first substrate comprising a sheet of polymeric material, the first substrate having a width; a first fabric on one side of the first substrate, the first fabric having a width less than the width of the first substrate such that a portion of the first substrate is exposed on both sides of the first fabric, the exposed portions of the first substrate forming opposed side edges of the first elongate sheet of the water vapor impermeable membrane.
  • the first elongate sheet of a water vapor impermeable membrane also comprises a first water vapor impermeable tape comprising a first water vapor impermeable backing; an adhesive disposed on one surface of the first backing; a first release sheet covering and releasably attached to one portion of the adhesive on the first backing; and the other portion of the adhesive on the first backing attached to the exposed portion of the first substrate adjacent one of the edges of the first elongate sheet of a water vapor impermeable membrane.
  • the method further comprises applying to a floor a second elongate sheet of a water vapor impermeable membrane comprising a second water vapor impermeable substrate, the second substrate comprising a sheet of polymeric material, the second substrate having a width; a first fabric on one side of the second substrate, the first fabric having a width less than the width of the second substrate such that a portion of the second substrate is exposed on both sides of the first fabric, the exposed portions of the second substrate forming opposed side edges of the second elongate sheet of a water vapor impermeable membrane.
  • the method also comprises aligning the edges of the first and second elongate sheets of a water vapor impermeable membrane in abutting relationship; removing the first release sheet; and placing the exposed edge portion of the second substrate on the portion of the exposed adhesive of the first water vapor impermeable tape thereby adhering the second elongate sheet of water vapor impermeable membrane thereto.
  • the present invention comprises a method.
  • the method comprises applying to a floor a first elongate sheet of a water vapor impermeable membrane; applying to the floor a second elongate sheet of a water vapor impermeable membrane; aligning adjacent edges of the first and second elongate sheets of a water vapor impermeable membrane in abutting relationship; and adhering the abutting edge of the second elongate sheet of a water vapor impermeable membrane to a portion of a water vapor impermeable adhesive tape, a portion of which is adhered to the abutting edge of the first elongate sheet of water vapor impermeable membrane.
  • the present invention comprises a method.
  • the method comprises applying to a floor a first sheet of a water vapor impermeable membrane; applying to the floor a second sheet of a water vapor impermeable membrane; aligning adjacent edges of the first and second sheets of water vapor impermeable membrane in abutting relationship and such that the edge of the second sheet of water vapor impermeable membrane overlays a release sheet on an adhesive portion of a water vapor impermeable adhesive tape adhered to the abutting edge of the first sheet of water vapor impermeable membrane; removing the release sheet from the adhesive portion of the water vapor impermeable adhesive tape; and adhering the abutting edge of the second sheet of a water vapor impermeable membrane to the adhesive portion of the water vapor impermeable adhesive tape.
  • the present invention comprises an article.
  • the article comprises an elongate layer of a water vapor impermeable polymeric material; a layer of adhesive on one side of the layer of polymeric material; and a release sheet removably adhered to the adhesive layer, the release sheet being cut or perforated along a longitudinal center of the release sheet so that a portion of the release sheet can be removed from the adhesive layer while another portion of the release sheet remains.
  • the present invention comprises a method.
  • the method comprises applying to a floor a water vapor impermeable adhesive tape comprising a layer of a water vapor impermeable polymeric material; a layer of adhesive on one side of the layer of polymeric material; and a release sheet removably adhered to the adhesive layer, the release sheet being at least partially cut so that a portion of the release sheet can be removed from a portion of the adhesive layer while another portion of the release sheet remains.
  • the method further comprises applying to the floor a first sheet of a water vapor impermeable membrane; removing a portion of the release sheet to expose a portion of the adhesive layer; adhering to the exposed portion of the adhesive layer an edge of the first sheet of water vapor impermeable membrane; applying to the floor a second sheet of a water vapor impermeable membrane; aligning an adjacent edge of the second sheet of water vapor impermeable membrane in butting relationship with the edge of the first sheet of water vapor impermeable membrane and overlaying the remaining portion of the release sheet; removing the remaining portion of the release sheet to expose the remaining portion of the adhesive layer; and adhering the abutting edge of the second sheet of water vapor impermeable membrane to the remaining portion of the adhesive layer. Accordingly, it is an object of the present invention to provide an improved moisture/water vapor barrier.
  • Another object of the present invention is to provide an improved method of applying a moisture/water vapor barrier to a porous floor, especially concrete.
  • a further object of the present invention is to provide an improved moisture/water vapor impermeable tape for joining adjacent sheets of a moisture/water vapor impermeable membrane.
  • Another object of the present invention is to provide an improved method of joining adjacent sheets of a moisture/water vapor impermeable membrane.
  • Yet another object of the present invention is to provide a moisture/water vapor barrier that can be used over chemically abated concrete fioors.
  • Another object of the present invention is to provide a moisture/water vapor barrier that can be used over concrete floors experiencing alkali silica reactions.
  • Fig. 1 is a partial top plan view of a disclosed embodiment of a sheet of a water vapor membrane in accordance with the present invention.
  • Fig. 2 is a partial cross-sectional view taken along the line 2— 2 of the sheet of water vapor membrane shown in Fig. 1.
  • Fig. 3 is schematic diagram of a method of manufacturing the water vapor membrane disclosed in Figs. 1, 2 and 4.
  • Fig. 4 is a partial cutaway top plan view of the water vapor membrane shown in Fig. 1 shown with a water vapor impermeable adhesive tape attached to one edge of the water vapor membrane.
  • Fig. 5 is a partial cross-sectional view taken along the line 5— 5 of the water vapor membrane and tape shown in Fig. 4.
  • Fig. 6 is a partial cutaway top plan view of the first water vapor membrane and tape shown in Fig. 4 shown with a second water vapor membrane in abutting relationship with the first water vapor membrane and the release sheet still on the adhesive tape.
  • Fig. 7 is a partial cutaway top plan view of the first water vapor membrane and tape shown in Fig. 4 shown with a second water vapor membrane in abutting relationship with the second water vapor membrane adhered to the adhesive tape.
  • Fig. 8 is a partial cross-sectional view taken along the line 8— 8 of the first and second water vapor membranes and tape shown in Fig. 7.
  • Fig. 9 is a partial top plan view of a disclosed embodiment of a water vapor impermeable adhesive tape in accordance with the present invention.
  • Fig. 10 is a partial cross-sectional view taken along the line 10— 10 of the adhesive tape shown in Fig. 9.
  • Fig. 11 is a partial top plan view of the adhesive tape shown in Fig. 9 above shown with two sheets of a water vapor membrane adhered thereto in end-to- end relationship.
  • Fig. 12 is a partial cross-sectional view taken along the line 12— 12 of the adhesive tape with two sheets of a water vapor membrane adhered thereto shown in Fig. 11.
  • water vapor impermeable shall mean having a water vapor transmission rating below 0.3 as measured by ASTM E96 and having no increase in relative humidity above the water vapor membrane as measured by ASTM 2420-05.
  • Fig. 1 a disclosed embodiment of a water vapor impermeable membrane 10 in accordance with the present invention.
  • the water vapor impermeable membrane 10 is shown laying flat on a horizontal concrete slab 12 having flat horizontal top surface 14.
  • the water vapor impermeable membrane 10 comprises a first sheet of water vapor impermeable polymeric material 16.
  • On either side (i.e., the top surface and the bottom surface) of the first sheet of water vapor impermeable polymeric material 16 are layers of fabric 18, 20 bonded to the first sheet of water vapor impermeable polymeric material.
  • the width of the water vapor impermeable membrane 10 is not critical to the present invention.
  • the water vapor impermeable membrane 10 can be approximately 3 to approximately 12 feet wide; preferably approximately 6 feet wide; for residential applications, the water vapor impermeable membrane 10 can be approximately 2 to approximately 12 feet wide; preferably approximately 4 feet wide.
  • the first sheet of water vapor impermeable polymeric material 16 is wider than the top and bottom layers of fabric 18, 20, respectively.
  • the top and bottom layers of fabric 18, 20 are disposed only in the middle of the first sheet of water vapor impermeable polymeric material 16 and do not extend out to the lateral edges 22, 24 of the first sheet of water vapor impermeable polymeric material 16.
  • the edge portions 26, 28 of the first sheet of water vapor impermeable polymeric material 16 be approximately 1 to approximately 5 inches wide, especially approximately 3 inches wide.
  • the water vapor impermeable polymeric membrane 10 can be attached to the underlying substrate, such as via adhesives or mechanical fasteners, or it can be free floating; i.e., not attached to the underlying substrate.
  • the adhesive used to attach the water vapor impermeable polymeric membrane 10 to the underlying substrate is not critical to the present invention.
  • a useful spray adhesive for attach the water vapor impermeable polymeric membrane 10 to the underlying substrate, such as the horizontal top surface 14 of the concrete slab 12, is commercially available under the designation Quantum Essentials from XL Brands, Resaca, GA; a useful mechanical fastener system is commercially available under the designation HK97 from Velcro USA Inc., Manchester, NH.
  • the particular polymer from which the first sheet of water vapor impermeable polymeric material 16 is made is not critical to the present invention, except that it must be water vapor impermeable, lay flat on a flat surface; i.e., have no or virtually no memory, and be pliable and stable at temperatures ranging from about 0 to about 40 °C.
  • the first sheet of water vapor impermeable polymeric material 16 is preferably made from a thermoplastic including, but not limited to, , ethylene methyl acrylate, polyethylene, polypropylene, acrylonitrile butadiene styrene, cellulose acetate, ethylene-vinyl acetate, polyacrylate, polyacrylonitrile, polyamide, polybutadiene, polybutylene, polybutylene terephthalate, polycaprolactone, polyethylene terephthalate, polycarbonate, polyester, polystyrene, polyurea, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, styrene-acrylonitrile, ethyl butyl acrylate or mixtures thereof.
  • a thermoplastic including, but not limited to, , ethylene methyl acrylate, polyethylene, polypropylene, acrylonitrile butadiene styrene, cellulose acetate, ethylene-
  • Post consumer recycled turf can also be used for the first sheet of water vapor impermeable polymeric material 16.
  • Recycled turf is typically made of polyethylene face fibers, polypropylene primary backing and a polyurethane or latex back coat.
  • Pellets of recycled synthetic turf are commercially available under the designation ThermoTex 1311A from the ThermoTex Division of Textile Rubber and Chemical Company, Inc., Cartersville, GA. Mixtures of virgin polymer and recycled turf can also be used in any proportion.
  • the first sheet of water vapor impermeable polymeric material 16 can be any thickness that is water vapor impermeable and is suitable for use as an underlayment for floor covering; preferably, approximately 0.002 to approximately 0.075 inches thick, especially approximately 0.035 inches thick.
  • the polymeric formulation from which the first sheet of water vapor impermeable polymeric material 16 is made may also optionally include typical polymer additives, including but not limited to, plasticizers; fillers; extenders; antimicrobials or biocides, such as mildewcides, bactericides or fungicides; deodorizers; antioxidants; antiseptic agents; antistatic agents; stabilizers; fire retardants; colorants and the like.
  • plasticizers plasticizers
  • fillers extenders
  • antimicrobials or biocides such as mildewcides, bactericides or fungicides
  • deodorizers antioxidants
  • antiseptic agents antistatic agents
  • stabilizers fire retardants
  • colorants and the like Up to 50% by weight (based on the weight of the polymer) additives can be used in the present invention; preferably, up to 25% by weight.
  • fillers may be used in the formulation for the first sheet of water vapor impermeable polymeric material 16, the more filler that is added, the less water vapor
  • fillers useful in the present invention include, but are not limited to, post consumer recycled minerals, calcium carbonate, barium sulfate, clays, magnesium hydroxide, alumina trihydrate, talc, Portland cement, feldspar, glass cullet, fly ash, gypsum, and mixtures thereof.
  • the top and bottom layers of fabric 18, 20 can be the same or different; however, they are preferably the same.
  • the top and bottom layers of fabric 18, 20 can be a woven or a nonwoven fabric.
  • the top and bottom layers of fabric 18, 20 are preferably made from synthetic fibers, such as polyester, polyamide, polypropylene, cotton, wool, polylactic acid, polybutylene terephthalate, polyvinyl alcohol, polyvinyl chloride, polyethylene, polyurethane or acrylic.
  • the top and bottom layers of fabric 18, 20 are preferably a nonwoven polyester point bond fabric, having a weight of approximately 50 grams per cubic meter. A nonwoven polyester point bond fabric having these properties is commercially available from Oxco, Inc. of Charlotte, North Carolina.
  • top and bottom layers of fabric 18, 20 can be attached to the first sheet of water vapor impermeable polymeric material 16 by any practical means known in the art, such as by an adhesive, it is preferred that the top and bottom layers of fabric be melt bonded to the first sheet of water vapor impermeable plastic.
  • Fig. 3 shows a process for simultaneously forming the first sheet of water vapor impermeable polymeric material 16 and melt bonding the top and bottom layers of fabric 18, 20 to the opposite sides thereof.
  • a first supply roll of fabric 30 disposed above and to the left of a pair of nip rolls 32, 34.
  • a second supply roll of fabric 36 is disposed above and to the right of the nip rolls 32, 34.
  • the fabric 38 from the supply roll 30 is fed between the two nip rolls 32, 34.
  • the fabric 40 from the supply roll 36 is also fed between the two nip rolls 32, 34.
  • the nip roll 32 is rotatably drive by an electric motor (not shown) which pulls the fabric 38, 40 through the gap between the two nip rollers 32, 34.
  • An extruder 42 is disposed above the two nip rolls 32, 34.
  • the extruder can be either a single screw extruder or a twin-screw extruder. Furthermore, a twin-screw extruder can have either co-rotating or counter rotating screws.
  • a suitable extruder is commercially available under the designation Model G6000 from PTI Extruders of Aurora, IL.
  • Such extruders also include heated barrels for heating and/or melting the materials being processed therein.
  • the barrel temperature can be adjusted to a desired temperature depending on the material be processed therein.
  • the barrel temperature of the extruder should be hot enough to melt the thermoplastic polymers being processed therein, preferably approximately 325 °F to approximately 550 °F, especially approximately 375 °F to approximately 450 °F.
  • the polymer formulation i.e., polymer(s) and any desired additives, for forming the sheet of water vapor impermeable polymeric material 16 is fed into the extruder 42 which both melts and mixes the plastic formulation and deposits the molten material onto the fabrics 38, 40 just as they pass between the nip rolls 32, 34.
  • the nip rolls 32, 34 squeeze the molten plastic formulation between the two sheets of fabric 38, 40 as they pass between the nip rolls. This process forms the molten plastic formulation into a flat sheet of a desired thickness and simultaneously forces some of the molten plastic formulation into the opposed sheets of fabric 38, 40.
  • the nip roll 34 is chilled with cold water so that as the molten plastic formulation passes between the nip rolls 32, 34 it is cooled, so that when the laminated composite structure 44 exits the nip rolls, the molten plastic formulation is solidified, or almost solidified.
  • the solidification of the plastic formulation bonds the two sheets of fabric 38, 40 to the opposite sides of the sheet of water vapor impermeable polymeric material 16.
  • the laminated composite structure 44 therefore comprises a first layer of fabric melt bonded to a layer of water vapor impermeable polymeric material and a second layer of fabric melt bonded to the opposite side of the layer of water vapor impermeable polymeric material.
  • This laminated composite structure 44 corresponds to the laminated structure of the water vapor impermeable membrane 10 shown in Figs. 1 and 2, wherein the fabric 38 corresponds to the top fabric 18 and the fabric 40 corresponds to the bottom fabric 20; i.e., the fabric adjacent to the surface 14 of the concrete slab 12.
  • the laminated composite structure 44 travels from the nip rolls 32, 34 to the idle roll 46 and then to a take-up roll 48.
  • an adhesive tape 50 is applied to an edge portion, such as the edge portion 28, of the water vapor impermeable membrane 10.
  • the adhesive tape preferably comprises a water vapor impermeable backing layer 52 and a water-proof or water-resistant adhesive layer 54 on one surface thereof.
  • the backing layer 52 can be made from any water vapor impermeable material, including but not limited to, polyester, ethylene methyl acrylate, polyethylene, polypropylene, acrylonitrile butadiene styrene, cellulose acetate, ethylene-vinyl acetate, polyacrylate, polyacrylonitrile, polyamide, polybutadiene, polybutylene, polybutylene terephthalate, polycaprolactone, polyethylene terephthalate, polycarbonate, polystyrene, polyurea, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, styrene-acrylonitrile, ethyl butyl acrylate or mixtures thereof, and the like.
  • the adhesive can be any suitable adhesive, such as pressure sensitive adhesives, contact adhesives, UV-curable adhesives, RF-curable adhesives, thermosetting adhesives and the like.
  • a water-vapor impermeable adhesive tape useful in the present invention having a low permeance high-density polyethylene film backing and a pressure-sensitive adhesive is commercially available under the designation Stego Tape from Stego Industries, LLC. San Clemente, CA. Covering one-half of the adhesive layer 54 is a release sheet 56 (Figs. 4 and 5).
  • the release sheet 56 can be made from any suitable material that will not adhere to the adhesive layer 54 too aggressively, so that it can be relatively easily removed therefrom without damaging the adhesive layer.
  • the release sheet is preferably made from waxed paper so that it can be recycled.
  • the adhesive tape 50 is fed from a supply roll 58 to a pair of nip rolls 60, 62 disposed between the idle roll 46 and the take-up roll 48.
  • the exposed portion of the adhesive layer 54 of the adhesive tape 50 is applied to the under side of the edge portion 28 of the water vapor impermeable membrane 16 as they both pass between the rolls 60, 62 (Fig. 3).
  • the adhesive tape 50 is more than 2 inches wide, preferably approximately 3 to approximately 6 inches wide, especially approximately 4 inches wide.
  • the water vapor impermeable membrane 10 is preferably in a roll, such as the roll 48 shown in Fig. 3.
  • the water vapor impermeable membrane 10 is used by laying the membrane on a flat, clean surface of a porous floor, such as the surface 14 of the concrete slab 12, as shown in Figs. 1, 2 and 4. This can be done by unrolling from the roll 48 a desired first length of the water vapor impermeable membrane 10 onto the concrete floor surface 14.
  • the first water vapor impermeable membrane 10 is then cut from the roll 48 and the first water vapor impermeable membrane is positioned on the floor as desired.
  • a second length of the water vapor impermeable membrane 10' which is identical in construction to the first water vapor impermeable membrane 10, is placed on the surface 14 of the concrete slab 12. This can be done by unrolling from the same roll 48 a desired second length of the water vapor impermeable membrane onto the concrete floor surface 14. The second water vapor impermeable membrane 10' is then cut from the roll 48 and the second water vapor impermeable membrane is positioned on the floor adjacent the first water vapor impermeable membrane 10. The second water vapor impermeable membrane 10' is then position in abutting relationship with the first water vapor impermeable membrane 10 (Fig.
  • edge portion 26' of the second water vapor impermeable membrane overlays the release sheet 56 and such that the edge portion 28 of the first water vapor impermeable membrane and the edge portion 26' of the second water vapor impermeable membrane form a tight butt joint 64.
  • the edge portion 26' of the second water vapor impermeable membrane 10' is then lifted temporarily from the adhesive tape 50 and the release sheet 56 is removed from the adhesive tape. After the release sheet 56 is removed, the edge portion 26' of the second water vapor impermeable membrane 10' is pushed down onto the adhesive layer 54 of the adhesive tape 50 (Fig. 7 and 8).
  • edge portions 28, 26' are then rolled with a weight to insure adhesion of the adhesive layer 54 to the edge portions of the first and second water vapor impermeable membranes 10, 10'. This procedure is repeated with additional sections of water vapor impermeable membrane until the floor surface is covered with the water vapor impermeable membrane.
  • the adhesive tape 50 is preferably 4 inches wide. Thus, there are approximately 2 inches of overlap between the adhesive tape 50 and each of the edge portions 28, 26' of the first and second water vapor impermeable membranes 10, 10'.
  • the present invention prevents, or substantially reduces, the penetration of moisture or water vapor between the adhesive tape 50 and the first and second water vapor impermeable membranes 10, 10'.
  • the tape 50 is placed on the bottom of the first and second water vapor impermeable membranes 10, 10', instead of on the top, as done in the prior art, the tape further reduces the possibility of moisture or water vapor penetrating through the joint 64 between the first and second water vapor impermeable membranes 10, 10'.
  • the foregoing describes the joining of adjacent sheets of the water vapor impermeable membrane in side-by-side relationship.
  • it is often necessary to join multiple sheets of the water vapor impermeable membrane in end-to- end relationship in order to obtain a sheet of a longer desired length.
  • the leading or trailing edge of a sheet of the water vapor impermeable membrane such as the leading edge 66 of the first water vapor impermeable membrane 10 (Fig. 1 and 11) and the trailing edge 68 of the second water vapor impermeable membrane 10' (Fig. 11), are found at the beginning and end of a roll of the water vapor impermeable membrane and are also formed when the water vapor impermeable membrane is cut from the roll.
  • the leading edge of a sheet of the water vapor impermeable membrane can be joined with the trailing edge of another sheet of the water vapor impermeable membrane in accordance with the present invention.
  • a different type of adhesive tape is required.
  • the adhesive tape 100 preferably comprises a water vapor impermeable backing layer 102 and a water-proof adhesive layer 104 on one surface thereof.
  • the water vapor impermeable backing layer 102 can be made from any water vapor impermeable material, including but not limited to, polyester, ethylene methyl acrylate, polyethylene, polypropylene, acrylonitrile butadiene styrene, cellulose acetate, ethylene-vinyl acetate, polyacrylate, polyacrylonitrile, polyamide, polybutadiene, polybutylene, polybutylene terephthalate, polycaprolactone, polyethylene terephthalate, polycarbonate, polystyrene, polyurea, polyvinyl acetate, polyvinyl chloride, polyvinylidene chloride, styrene-acrylonitrile, ethyl butyl acrylate or mixtures thereof, and the like.
  • the adhesive can be any suitable adhesive, such as pressure sensitive adhesives, contact adhesives, UV-curable adhesives, RF-curable adhesives, thermosetting adhesives and the like.
  • the adhesive is a conventional water-proof or water-resistant acrylic- based contact adhesive, such as a pressure sensitive adhesive commercially available under the designation Quantum Essentials from XL Brands, Resaca, GA.
  • Covering all of the adhesive layer 104 is a release sheet 106.
  • the release sheet 106 can be made from any suitable material that will not adhere to the adhesive layer 106 to aggressively, so that it can be relatively easily removed therefrom without damaging the adhesive layer. Many types of materials are known in the art that are useful as a release sheet.
  • the release sheet is preferably made from waxed paper so that it can be recycled.
  • the release sheet 106 covers the entire adhesive layer 104.
  • the release sheet 106 is cut or perforated along the longitudinal centerline 108 of the release sheet. The cut or perforation penetrates through the release sheet 106, but does not penetrate through the adhesive layer 104 or the backing layer 102, so that the release sheet can be removed one-half at a time, as desired.
  • the adhesive tape 100 is more than 2 inches wide, preferably approximately 3 to approximately 6 inches wide, especially approximately 4 inches wide.
  • a first water vapor impermeable membrane 10 is laid on a flat, clean surface of a porous floor, such as the horizontal; surface 14 of the concrete slab 12, as shown in Figs. 11 and 12. This can be done by unrolling from the roll 48 a desired first length of the water vapor impermeable membrane 10 onto the concrete floor surface 14. The first water vapor impermeable membrane 10 is then cut from the roll 48 and the first water vapor impermeable membrane is positioned on the floor as desired.
  • a strip of the adhesive tape 100 equal to the width of the first water vapor impermeable membrane 10 is cut from a roll thereof and laid on the floor adjacent the first water vapor impermeable membrane 10.
  • the leading edge 66 of the first water vapor impermeable membrane 10 is laid on top of the release sheet 106 of the adhesive tape 100.
  • the leading edge 66 is aligned with the cut or perforated centerline 108 of the adhesive tape 100.
  • the leading edge 66 the first water vapor impermeable membrane 10 is then lifted temporarily and the portion of the release sheet 106 under the leading edge is removed from the adhesive tape 100 leaving the other portion of the release sheet in place on the adhesive tape.
  • the leading edge 66 of the first water vapor impermeable membrane 10 is pushed down onto the exposed portion of the adhesive layer 104 of the adhesive tape 100 (Fig. 11 and 12). Then, a second length of the water vapor impermeable membrane 10', which is identical in construction to the first water vapor impermeable membrane 10, is placed on the surface 14 of the concrete slab 12. This can be done by unrolling from the same roll 48 a desired second length of the water vapor impermeable membrane onto the concrete floor surface 14. The second water vapor impermeable membrane 10' is then cut from the roll 48 and the second water vapor impermeable membrane is positioned on the floor adjacent the first water vapor impermeable membrane 10.
  • the second water vapor impermeable membrane 10' is then position end-to-end with the first water vapor impermeable membrane 10'; i.e., so that the trailing edge 68 of the second water vapor impermeable membrane 10' is aligned with and the leading edge 66 of the first water vapor impermeable membrane 10 so as to form a butt joint 110 therebetween, as shown in Figs 11 and 12.
  • the trailing edge 68 of the second water vapor impermeable membrane 10' is then lifted temporarily and the portion of the release sheet 106 under the trailing edge is removed from the adhesive tape 100 exposing the remaing portion of the adhesive layer 104.
  • the trailing edge 68 of the second water vapor impermeable membrane 10' is pushed down onto the exposed portion of the adhesive layer 104 of the adhesive tape 100 (Fig. 11 and 12).
  • the leading and trailing edges 66, 68 are then rolled with a weight to insure adhesion of the adhesive layer 104 to the leading and trailing edge portions of the first and second water vapor impermeable membranes 10, 10'. This procedure is repeated with additional sections of water vapor impermeable membrane, as needed.
  • the following test was performed on four test samples of the water vapor impermeable membrane as described above. For these tests, the fabric layers were omitted from the water vapor impermeable membrane. The four water vapor impermeable membranes were made from different thermoplastic polymers and different combinations of polymers. The purpose of the test was to determine whether those test samples were water vapor impermeable. The tests were performed in accordance with ASTM E96 and ASTM F2420 for the determination of water vapor transmission and permeance.
  • Test Dish The test dish was made from a non-corroding material, impermeable to water or water vapor.
  • the mouth of the dish was 3.875 in 2 .
  • the desiccant or wafer area the same as the mouth area.
  • Test Chamber The cabinet where the assembled test dishes were placed had controlled temperature and relative humidity. The relative humidity was maintained at 50%. Both temperature and relative humidity were measured frequently. Air was continuously circulated throughout the chamber, with a velocity sufficient to maintain uniform conditions at all test locations. The air velocity over the specimen was 0.1 ft/s. Racks were provided on which to place the test dishes within the test chamber. Balance and Weights— The balance was sensitive to a change smaller than 1 % of the weight change during the period when a steady state was considered to exist. The weights used were accurate to 1% of the weight change during the steady- state period.
  • Thickness-Measuring Gage The nominal thickness of the specimen was determined using a thickness-measuring gage with an accuracy of 0.00005 in. Procedure for Desiccant Method
  • test dish was filled with desiccant within 1/4 in. (6 mm) of the specimen.
  • the specimen was attached to the dish and placed in the controlled chamber, specimen up, weighing it at once.
  • the dish was weighed every 24 hours. Calculation and Analysis of Results
  • test area cup mouth area
  • ft test area
  • R.2 relative humidity at the vapor sink expressed as a fraction.
  • Results A) 100% Recycled Synthetic Turf having a polyethylene face fiber, polypropylene primary and polyurethane back coat.
  • a water vapor transmission of 0.3 grains/hr/ft 2 is considered to be water vapor impermeable.
  • a permeance of less than 0.3 is considered to be water vapor impermeable. Therefore, the foregoing tests demonstrate that all four samples were water vapor impermeable.

Landscapes

  • Floor Finish (AREA)

Abstract

La présente invention porte sur une barrière contre la vapeur d'eau. La barrière contre la vapeur d'eau comprend un substrat imperméable à la vapeur d'eau, le substrat comprenant une feuille de matériau polymère et le substrat ayant une largeur. La barrière contre la vapeur d'eau comprend également un premier tissu sur un côté du substrat, le premier tissu ayant une largeur inférieure à la largeur du substrat, de telle sorte qu'une partie du substrat est exposée des deux côtés du premier tissu. L'invention porte également sur un procédé d'installation de la barrière contre la vapeur d'eau.
PCT/US2012/050270 2011-10-03 2012-08-10 Barrière contre l'humidité/la vapeur et son procédé de réalisation et d'utilisation Ceased WO2013052201A1 (fr)

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US13/251,362 US20130084419A1 (en) 2011-10-03 2011-10-03 Moisture/vapor barrier and method of making and using same

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